1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed 8 * to Berkeley by John Heidemann of the UCLA Ficus project. 9 * 10 * Source: * @(#)i405_init.c 2.10 92/04/27 UCLA Ficus project 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/bio.h> 43 #include <sys/buf.h> 44 #include <sys/conf.h> 45 #include <sys/event.h> 46 #include <sys/filio.h> 47 #include <sys/kernel.h> 48 #include <sys/limits.h> 49 #include <sys/lock.h> 50 #include <sys/lockf.h> 51 #include <sys/malloc.h> 52 #include <sys/mount.h> 53 #include <sys/namei.h> 54 #include <sys/rwlock.h> 55 #include <sys/fcntl.h> 56 #include <sys/unistd.h> 57 #include <sys/vnode.h> 58 #include <sys/dirent.h> 59 #include <sys/poll.h> 60 #include <sys/stat.h> 61 #include <security/audit/audit.h> 62 #include <sys/priv.h> 63 64 #include <security/mac/mac_framework.h> 65 66 #include <vm/vm.h> 67 #include <vm/vm_object.h> 68 #include <vm/vm_extern.h> 69 #include <vm/pmap.h> 70 #include <vm/vm_map.h> 71 #include <vm/vm_page.h> 72 #include <vm/vm_pager.h> 73 #include <vm/vnode_pager.h> 74 75 static int vop_nolookup(struct vop_lookup_args *); 76 static int vop_norename(struct vop_rename_args *); 77 static int vop_nostrategy(struct vop_strategy_args *); 78 static int get_next_dirent(struct vnode *vp, struct dirent **dpp, 79 char *dirbuf, int dirbuflen, off_t *off, 80 char **cpos, int *len, int *eofflag, 81 struct thread *td); 82 static int dirent_exists(struct vnode *vp, const char *dirname, 83 struct thread *td); 84 85 #define DIRENT_MINSIZE (sizeof(struct dirent) - (MAXNAMLEN+1) + 4) 86 87 static int vop_stdis_text(struct vop_is_text_args *ap); 88 static int vop_stdunset_text(struct vop_unset_text_args *ap); 89 static int vop_stdadd_writecount(struct vop_add_writecount_args *ap); 90 static int vop_stdcopy_file_range(struct vop_copy_file_range_args *ap); 91 static int vop_stdfdatasync(struct vop_fdatasync_args *ap); 92 static int vop_stdgetpages_async(struct vop_getpages_async_args *ap); 93 static int vop_stdread_pgcache(struct vop_read_pgcache_args *ap); 94 static int vop_stdstat(struct vop_stat_args *ap); 95 static int vop_stdvput_pair(struct vop_vput_pair_args *ap); 96 static int vop_stddeallocate(struct vop_deallocate_args *ap); 97 98 /* 99 * This vnode table stores what we want to do if the filesystem doesn't 100 * implement a particular VOP. 101 * 102 * If there is no specific entry here, we will return EOPNOTSUPP. 103 * 104 * Note that every filesystem has to implement either vop_access 105 * or vop_accessx; failing to do so will result in immediate crash 106 * due to stack overflow, as vop_stdaccess() calls vop_stdaccessx(), 107 * which calls vop_stdaccess() etc. 108 */ 109 110 struct vop_vector default_vnodeops = { 111 .vop_default = NULL, 112 .vop_bypass = VOP_EOPNOTSUPP, 113 114 .vop_access = vop_stdaccess, 115 .vop_accessx = vop_stdaccessx, 116 .vop_advise = vop_stdadvise, 117 .vop_advlock = vop_stdadvlock, 118 .vop_advlockasync = vop_stdadvlockasync, 119 .vop_advlockpurge = vop_stdadvlockpurge, 120 .vop_allocate = vop_stdallocate, 121 .vop_deallocate = vop_stddeallocate, 122 .vop_bmap = vop_stdbmap, 123 .vop_close = VOP_NULL, 124 .vop_fsync = VOP_NULL, 125 .vop_stat = vop_stdstat, 126 .vop_fdatasync = vop_stdfdatasync, 127 .vop_getpages = vop_stdgetpages, 128 .vop_getpages_async = vop_stdgetpages_async, 129 .vop_getwritemount = vop_stdgetwritemount, 130 .vop_inactive = VOP_NULL, 131 .vop_need_inactive = vop_stdneed_inactive, 132 .vop_ioctl = vop_stdioctl, 133 .vop_kqfilter = vop_stdkqfilter, 134 .vop_islocked = vop_stdislocked, 135 .vop_lock1 = vop_stdlock, 136 .vop_lookup = vop_nolookup, 137 .vop_open = VOP_NULL, 138 .vop_pathconf = VOP_EINVAL, 139 .vop_poll = vop_nopoll, 140 .vop_putpages = vop_stdputpages, 141 .vop_readlink = VOP_EINVAL, 142 .vop_read_pgcache = vop_stdread_pgcache, 143 .vop_rename = vop_norename, 144 .vop_revoke = VOP_PANIC, 145 .vop_strategy = vop_nostrategy, 146 .vop_unlock = vop_stdunlock, 147 .vop_vptocnp = vop_stdvptocnp, 148 .vop_vptofh = vop_stdvptofh, 149 .vop_unp_bind = vop_stdunp_bind, 150 .vop_unp_connect = vop_stdunp_connect, 151 .vop_unp_detach = vop_stdunp_detach, 152 .vop_is_text = vop_stdis_text, 153 .vop_set_text = vop_stdset_text, 154 .vop_unset_text = vop_stdunset_text, 155 .vop_add_writecount = vop_stdadd_writecount, 156 .vop_copy_file_range = vop_stdcopy_file_range, 157 .vop_vput_pair = vop_stdvput_pair, 158 }; 159 VFS_VOP_VECTOR_REGISTER(default_vnodeops); 160 161 /* 162 * Series of placeholder functions for various error returns for 163 * VOPs. 164 */ 165 166 int 167 vop_eopnotsupp(struct vop_generic_args *ap) 168 { 169 /* 170 printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name); 171 */ 172 173 return (EOPNOTSUPP); 174 } 175 176 int 177 vop_ebadf(struct vop_generic_args *ap) 178 { 179 180 return (EBADF); 181 } 182 183 int 184 vop_enotty(struct vop_generic_args *ap) 185 { 186 187 return (ENOTTY); 188 } 189 190 int 191 vop_einval(struct vop_generic_args *ap) 192 { 193 194 return (EINVAL); 195 } 196 197 int 198 vop_enoent(struct vop_generic_args *ap) 199 { 200 201 return (ENOENT); 202 } 203 204 int 205 vop_eagain(struct vop_generic_args *ap) 206 { 207 208 return (EAGAIN); 209 } 210 211 int 212 vop_null(struct vop_generic_args *ap) 213 { 214 215 return (0); 216 } 217 218 /* 219 * Helper function to panic on some bad VOPs in some filesystems. 220 */ 221 int 222 vop_panic(struct vop_generic_args *ap) 223 { 224 225 panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name); 226 } 227 228 /* 229 * vop_std<something> and vop_no<something> are default functions for use by 230 * filesystems that need the "default reasonable" implementation for a 231 * particular operation. 232 * 233 * The documentation for the operations they implement exists (if it exists) 234 * in the VOP_<SOMETHING>(9) manpage (all uppercase). 235 */ 236 237 /* 238 * Default vop for filesystems that do not support name lookup 239 */ 240 static int 241 vop_nolookup(ap) 242 struct vop_lookup_args /* { 243 struct vnode *a_dvp; 244 struct vnode **a_vpp; 245 struct componentname *a_cnp; 246 } */ *ap; 247 { 248 249 *ap->a_vpp = NULL; 250 return (ENOTDIR); 251 } 252 253 /* 254 * vop_norename: 255 * 256 * Handle unlock and reference counting for arguments of vop_rename 257 * for filesystems that do not implement rename operation. 258 */ 259 static int 260 vop_norename(struct vop_rename_args *ap) 261 { 262 263 vop_rename_fail(ap); 264 return (EOPNOTSUPP); 265 } 266 267 /* 268 * vop_nostrategy: 269 * 270 * Strategy routine for VFS devices that have none. 271 * 272 * BIO_ERROR and B_INVAL must be cleared prior to calling any strategy 273 * routine. Typically this is done for a BIO_READ strategy call. 274 * Typically B_INVAL is assumed to already be clear prior to a write 275 * and should not be cleared manually unless you just made the buffer 276 * invalid. BIO_ERROR should be cleared either way. 277 */ 278 279 static int 280 vop_nostrategy (struct vop_strategy_args *ap) 281 { 282 printf("No strategy for buffer at %p\n", ap->a_bp); 283 vn_printf(ap->a_vp, "vnode "); 284 ap->a_bp->b_ioflags |= BIO_ERROR; 285 ap->a_bp->b_error = EOPNOTSUPP; 286 bufdone(ap->a_bp); 287 return (EOPNOTSUPP); 288 } 289 290 static int 291 get_next_dirent(struct vnode *vp, struct dirent **dpp, char *dirbuf, 292 int dirbuflen, off_t *off, char **cpos, int *len, 293 int *eofflag, struct thread *td) 294 { 295 int error, reclen; 296 struct uio uio; 297 struct iovec iov; 298 struct dirent *dp; 299 300 KASSERT(VOP_ISLOCKED(vp), ("vp %p is not locked", vp)); 301 KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp)); 302 303 if (*len == 0) { 304 iov.iov_base = dirbuf; 305 iov.iov_len = dirbuflen; 306 307 uio.uio_iov = &iov; 308 uio.uio_iovcnt = 1; 309 uio.uio_offset = *off; 310 uio.uio_resid = dirbuflen; 311 uio.uio_segflg = UIO_SYSSPACE; 312 uio.uio_rw = UIO_READ; 313 uio.uio_td = td; 314 315 *eofflag = 0; 316 317 #ifdef MAC 318 error = mac_vnode_check_readdir(td->td_ucred, vp); 319 if (error == 0) 320 #endif 321 error = VOP_READDIR(vp, &uio, td->td_ucred, eofflag, 322 NULL, NULL); 323 if (error) 324 return (error); 325 326 *off = uio.uio_offset; 327 328 *cpos = dirbuf; 329 *len = (dirbuflen - uio.uio_resid); 330 331 if (*len == 0) 332 return (ENOENT); 333 } 334 335 dp = (struct dirent *)(*cpos); 336 reclen = dp->d_reclen; 337 *dpp = dp; 338 339 /* check for malformed directory.. */ 340 if (reclen < DIRENT_MINSIZE) 341 return (EINVAL); 342 343 *cpos += reclen; 344 *len -= reclen; 345 346 return (0); 347 } 348 349 /* 350 * Check if a named file exists in a given directory vnode. 351 */ 352 static int 353 dirent_exists(struct vnode *vp, const char *dirname, struct thread *td) 354 { 355 char *dirbuf, *cpos; 356 int error, eofflag, dirbuflen, len, found; 357 off_t off; 358 struct dirent *dp; 359 struct vattr va; 360 361 KASSERT(VOP_ISLOCKED(vp), ("vp %p is not locked", vp)); 362 KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp)); 363 364 found = 0; 365 366 error = VOP_GETATTR(vp, &va, td->td_ucred); 367 if (error) 368 return (found); 369 370 dirbuflen = DEV_BSIZE; 371 if (dirbuflen < va.va_blocksize) 372 dirbuflen = va.va_blocksize; 373 dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK); 374 375 off = 0; 376 len = 0; 377 do { 378 error = get_next_dirent(vp, &dp, dirbuf, dirbuflen, &off, 379 &cpos, &len, &eofflag, td); 380 if (error) 381 goto out; 382 383 if (dp->d_type != DT_WHT && dp->d_fileno != 0 && 384 strcmp(dp->d_name, dirname) == 0) { 385 found = 1; 386 goto out; 387 } 388 } while (len > 0 || !eofflag); 389 390 out: 391 free(dirbuf, M_TEMP); 392 return (found); 393 } 394 395 int 396 vop_stdaccess(struct vop_access_args *ap) 397 { 398 399 KASSERT((ap->a_accmode & ~(VEXEC | VWRITE | VREAD | VADMIN | 400 VAPPEND)) == 0, ("invalid bit in accmode")); 401 402 return (VOP_ACCESSX(ap->a_vp, ap->a_accmode, ap->a_cred, ap->a_td)); 403 } 404 405 int 406 vop_stdaccessx(struct vop_accessx_args *ap) 407 { 408 int error; 409 accmode_t accmode = ap->a_accmode; 410 411 error = vfs_unixify_accmode(&accmode); 412 if (error != 0) 413 return (error); 414 415 if (accmode == 0) 416 return (0); 417 418 return (VOP_ACCESS(ap->a_vp, accmode, ap->a_cred, ap->a_td)); 419 } 420 421 /* 422 * Advisory record locking support 423 */ 424 int 425 vop_stdadvlock(struct vop_advlock_args *ap) 426 { 427 struct vnode *vp; 428 struct mount *mp; 429 struct vattr vattr; 430 int error; 431 432 vp = ap->a_vp; 433 434 /* 435 * Provide atomicity of open(O_CREAT | O_EXCL | O_EXLOCK) for 436 * local filesystems. See vn_open_cred() for reciprocal part. 437 */ 438 mp = vp->v_mount; 439 if (mp != NULL && (mp->mnt_flag & MNT_LOCAL) != 0 && 440 ap->a_op == F_SETLK && (ap->a_flags & F_FIRSTOPEN) == 0) { 441 VI_LOCK(vp); 442 while ((vp->v_iflag & VI_FOPENING) != 0) 443 msleep(vp, VI_MTX(vp), PLOCK, "lockfo", 0); 444 VI_UNLOCK(vp); 445 } 446 447 if (ap->a_fl->l_whence == SEEK_END) { 448 /* 449 * The NFSv4 server must avoid doing a vn_lock() here, since it 450 * can deadlock the nfsd threads, due to a LOR. Fortunately 451 * the NFSv4 server always uses SEEK_SET and this code is 452 * only required for the SEEK_END case. 453 */ 454 vn_lock(vp, LK_SHARED | LK_RETRY); 455 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); 456 VOP_UNLOCK(vp); 457 if (error) 458 return (error); 459 } else 460 vattr.va_size = 0; 461 462 return (lf_advlock(ap, &(vp->v_lockf), vattr.va_size)); 463 } 464 465 int 466 vop_stdadvlockasync(struct vop_advlockasync_args *ap) 467 { 468 struct vnode *vp; 469 struct vattr vattr; 470 int error; 471 472 vp = ap->a_vp; 473 if (ap->a_fl->l_whence == SEEK_END) { 474 /* The size argument is only needed for SEEK_END. */ 475 vn_lock(vp, LK_SHARED | LK_RETRY); 476 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); 477 VOP_UNLOCK(vp); 478 if (error) 479 return (error); 480 } else 481 vattr.va_size = 0; 482 483 return (lf_advlockasync(ap, &(vp->v_lockf), vattr.va_size)); 484 } 485 486 int 487 vop_stdadvlockpurge(struct vop_advlockpurge_args *ap) 488 { 489 struct vnode *vp; 490 491 vp = ap->a_vp; 492 lf_purgelocks(vp, &vp->v_lockf); 493 return (0); 494 } 495 496 /* 497 * vop_stdpathconf: 498 * 499 * Standard implementation of POSIX pathconf, to get information about limits 500 * for a filesystem. 501 * Override per filesystem for the case where the filesystem has smaller 502 * limits. 503 */ 504 int 505 vop_stdpathconf(ap) 506 struct vop_pathconf_args /* { 507 struct vnode *a_vp; 508 int a_name; 509 int *a_retval; 510 } */ *ap; 511 { 512 513 switch (ap->a_name) { 514 case _PC_ASYNC_IO: 515 *ap->a_retval = _POSIX_ASYNCHRONOUS_IO; 516 return (0); 517 case _PC_PATH_MAX: 518 *ap->a_retval = PATH_MAX; 519 return (0); 520 case _PC_ACL_EXTENDED: 521 case _PC_ACL_NFS4: 522 case _PC_CAP_PRESENT: 523 case _PC_DEALLOC_PRESENT: 524 case _PC_INF_PRESENT: 525 case _PC_MAC_PRESENT: 526 *ap->a_retval = 0; 527 return (0); 528 default: 529 return (EINVAL); 530 } 531 /* NOTREACHED */ 532 } 533 534 /* 535 * Standard lock, unlock and islocked functions. 536 */ 537 int 538 vop_stdlock(ap) 539 struct vop_lock1_args /* { 540 struct vnode *a_vp; 541 int a_flags; 542 char *file; 543 int line; 544 } */ *ap; 545 { 546 struct vnode *vp = ap->a_vp; 547 struct mtx *ilk; 548 549 ilk = VI_MTX(vp); 550 return (lockmgr_lock_flags(vp->v_vnlock, ap->a_flags, 551 &ilk->lock_object, ap->a_file, ap->a_line)); 552 } 553 554 /* See above. */ 555 int 556 vop_stdunlock(ap) 557 struct vop_unlock_args /* { 558 struct vnode *a_vp; 559 } */ *ap; 560 { 561 struct vnode *vp = ap->a_vp; 562 563 return (lockmgr_unlock(vp->v_vnlock)); 564 } 565 566 /* See above. */ 567 int 568 vop_stdislocked(ap) 569 struct vop_islocked_args /* { 570 struct vnode *a_vp; 571 } */ *ap; 572 { 573 574 return (lockstatus(ap->a_vp->v_vnlock)); 575 } 576 577 /* 578 * Variants of the above set. 579 * 580 * Differences are: 581 * - shared locking disablement is not supported 582 * - v_vnlock pointer is not honored 583 */ 584 int 585 vop_lock(ap) 586 struct vop_lock1_args /* { 587 struct vnode *a_vp; 588 int a_flags; 589 char *file; 590 int line; 591 } */ *ap; 592 { 593 struct vnode *vp = ap->a_vp; 594 int flags = ap->a_flags; 595 struct mtx *ilk; 596 597 MPASS(vp->v_vnlock == &vp->v_lock); 598 599 if (__predict_false((flags & ~(LK_TYPE_MASK | LK_NODDLKTREAT | LK_RETRY)) != 0)) 600 goto other; 601 602 switch (flags & LK_TYPE_MASK) { 603 case LK_SHARED: 604 return (lockmgr_slock(&vp->v_lock, flags, ap->a_file, ap->a_line)); 605 case LK_EXCLUSIVE: 606 return (lockmgr_xlock(&vp->v_lock, flags, ap->a_file, ap->a_line)); 607 } 608 other: 609 ilk = VI_MTX(vp); 610 return (lockmgr_lock_flags(&vp->v_lock, flags, 611 &ilk->lock_object, ap->a_file, ap->a_line)); 612 } 613 614 int 615 vop_unlock(ap) 616 struct vop_unlock_args /* { 617 struct vnode *a_vp; 618 } */ *ap; 619 { 620 struct vnode *vp = ap->a_vp; 621 622 MPASS(vp->v_vnlock == &vp->v_lock); 623 624 return (lockmgr_unlock(&vp->v_lock)); 625 } 626 627 int 628 vop_islocked(ap) 629 struct vop_islocked_args /* { 630 struct vnode *a_vp; 631 } */ *ap; 632 { 633 struct vnode *vp = ap->a_vp; 634 635 MPASS(vp->v_vnlock == &vp->v_lock); 636 637 return (lockstatus(&vp->v_lock)); 638 } 639 640 /* 641 * Return true for select/poll. 642 */ 643 int 644 vop_nopoll(ap) 645 struct vop_poll_args /* { 646 struct vnode *a_vp; 647 int a_events; 648 struct ucred *a_cred; 649 struct thread *a_td; 650 } */ *ap; 651 { 652 653 if (ap->a_events & ~POLLSTANDARD) 654 return (POLLNVAL); 655 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 656 } 657 658 /* 659 * Implement poll for local filesystems that support it. 660 */ 661 int 662 vop_stdpoll(ap) 663 struct vop_poll_args /* { 664 struct vnode *a_vp; 665 int a_events; 666 struct ucred *a_cred; 667 struct thread *a_td; 668 } */ *ap; 669 { 670 if (ap->a_events & ~POLLSTANDARD) 671 return (vn_pollrecord(ap->a_vp, ap->a_td, ap->a_events)); 672 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 673 } 674 675 /* 676 * Return our mount point, as we will take charge of the writes. 677 */ 678 int 679 vop_stdgetwritemount(ap) 680 struct vop_getwritemount_args /* { 681 struct vnode *a_vp; 682 struct mount **a_mpp; 683 } */ *ap; 684 { 685 struct mount *mp; 686 struct vnode *vp; 687 688 /* 689 * Note that having a reference does not prevent forced unmount from 690 * setting ->v_mount to NULL after the lock gets released. This is of 691 * no consequence for typical consumers (most notably vn_start_write) 692 * since in this case the vnode is VIRF_DOOMED. Unmount might have 693 * progressed far enough that its completion is only delayed by the 694 * reference obtained here. The consumer only needs to concern itself 695 * with releasing it. 696 */ 697 vp = ap->a_vp; 698 mp = vfs_ref_from_vp(vp); 699 *(ap->a_mpp) = mp; 700 return (0); 701 } 702 703 /* 704 * If the file system doesn't implement VOP_BMAP, then return sensible defaults: 705 * - Return the vnode's bufobj instead of any underlying device's bufobj 706 * - Calculate the physical block number as if there were equal size 707 * consecutive blocks, but 708 * - Report no contiguous runs of blocks. 709 */ 710 int 711 vop_stdbmap(ap) 712 struct vop_bmap_args /* { 713 struct vnode *a_vp; 714 daddr_t a_bn; 715 struct bufobj **a_bop; 716 daddr_t *a_bnp; 717 int *a_runp; 718 int *a_runb; 719 } */ *ap; 720 { 721 722 if (ap->a_bop != NULL) 723 *ap->a_bop = &ap->a_vp->v_bufobj; 724 if (ap->a_bnp != NULL) 725 *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize); 726 if (ap->a_runp != NULL) 727 *ap->a_runp = 0; 728 if (ap->a_runb != NULL) 729 *ap->a_runb = 0; 730 return (0); 731 } 732 733 int 734 vop_stdfsync(ap) 735 struct vop_fsync_args /* { 736 struct vnode *a_vp; 737 int a_waitfor; 738 struct thread *a_td; 739 } */ *ap; 740 { 741 742 return (vn_fsync_buf(ap->a_vp, ap->a_waitfor)); 743 } 744 745 static int 746 vop_stdfdatasync(struct vop_fdatasync_args *ap) 747 { 748 749 return (VOP_FSYNC(ap->a_vp, MNT_WAIT, ap->a_td)); 750 } 751 752 int 753 vop_stdfdatasync_buf(struct vop_fdatasync_args *ap) 754 { 755 756 return (vn_fsync_buf(ap->a_vp, MNT_WAIT)); 757 } 758 759 /* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */ 760 int 761 vop_stdgetpages(ap) 762 struct vop_getpages_args /* { 763 struct vnode *a_vp; 764 vm_page_t *a_m; 765 int a_count; 766 int *a_rbehind; 767 int *a_rahead; 768 } */ *ap; 769 { 770 771 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, 772 ap->a_count, ap->a_rbehind, ap->a_rahead, NULL, NULL); 773 } 774 775 static int 776 vop_stdgetpages_async(struct vop_getpages_async_args *ap) 777 { 778 int error; 779 780 error = VOP_GETPAGES(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind, 781 ap->a_rahead); 782 if (ap->a_iodone != NULL) 783 ap->a_iodone(ap->a_arg, ap->a_m, ap->a_count, error); 784 return (error); 785 } 786 787 int 788 vop_stdkqfilter(struct vop_kqfilter_args *ap) 789 { 790 return vfs_kqfilter(ap); 791 } 792 793 /* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */ 794 int 795 vop_stdputpages(ap) 796 struct vop_putpages_args /* { 797 struct vnode *a_vp; 798 vm_page_t *a_m; 799 int a_count; 800 int a_sync; 801 int *a_rtvals; 802 } */ *ap; 803 { 804 805 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 806 ap->a_sync, ap->a_rtvals); 807 } 808 809 int 810 vop_stdvptofh(struct vop_vptofh_args *ap) 811 { 812 return (EOPNOTSUPP); 813 } 814 815 int 816 vop_stdvptocnp(struct vop_vptocnp_args *ap) 817 { 818 struct vnode *vp = ap->a_vp; 819 struct vnode **dvp = ap->a_vpp; 820 struct ucred *cred; 821 char *buf = ap->a_buf; 822 size_t *buflen = ap->a_buflen; 823 char *dirbuf, *cpos; 824 int i, error, eofflag, dirbuflen, flags, locked, len, covered; 825 off_t off; 826 ino_t fileno; 827 struct vattr va; 828 struct nameidata nd; 829 struct thread *td; 830 struct dirent *dp; 831 struct vnode *mvp; 832 833 i = *buflen; 834 error = 0; 835 covered = 0; 836 td = curthread; 837 cred = td->td_ucred; 838 839 if (vp->v_type != VDIR) 840 return (ENOENT); 841 842 error = VOP_GETATTR(vp, &va, cred); 843 if (error) 844 return (error); 845 846 VREF(vp); 847 locked = VOP_ISLOCKED(vp); 848 VOP_UNLOCK(vp); 849 NDINIT_ATVP(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 850 "..", vp, td); 851 flags = FREAD; 852 error = vn_open_cred(&nd, &flags, 0, VN_OPEN_NOAUDIT, cred, NULL); 853 if (error) { 854 vn_lock(vp, locked | LK_RETRY); 855 return (error); 856 } 857 NDFREE(&nd, NDF_ONLY_PNBUF); 858 859 mvp = *dvp = nd.ni_vp; 860 861 if (vp->v_mount != (*dvp)->v_mount && 862 ((*dvp)->v_vflag & VV_ROOT) && 863 ((*dvp)->v_mount->mnt_flag & MNT_UNION)) { 864 *dvp = (*dvp)->v_mount->mnt_vnodecovered; 865 VREF(mvp); 866 VOP_UNLOCK(mvp); 867 vn_close(mvp, FREAD, cred, td); 868 VREF(*dvp); 869 vn_lock(*dvp, LK_SHARED | LK_RETRY); 870 covered = 1; 871 } 872 873 fileno = va.va_fileid; 874 875 dirbuflen = DEV_BSIZE; 876 if (dirbuflen < va.va_blocksize) 877 dirbuflen = va.va_blocksize; 878 dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK); 879 880 if ((*dvp)->v_type != VDIR) { 881 error = ENOENT; 882 goto out; 883 } 884 885 off = 0; 886 len = 0; 887 do { 888 /* call VOP_READDIR of parent */ 889 error = get_next_dirent(*dvp, &dp, dirbuf, dirbuflen, &off, 890 &cpos, &len, &eofflag, td); 891 if (error) 892 goto out; 893 894 if ((dp->d_type != DT_WHT) && 895 (dp->d_fileno == fileno)) { 896 if (covered) { 897 VOP_UNLOCK(*dvp); 898 vn_lock(mvp, LK_SHARED | LK_RETRY); 899 if (dirent_exists(mvp, dp->d_name, td)) { 900 error = ENOENT; 901 VOP_UNLOCK(mvp); 902 vn_lock(*dvp, LK_SHARED | LK_RETRY); 903 goto out; 904 } 905 VOP_UNLOCK(mvp); 906 vn_lock(*dvp, LK_SHARED | LK_RETRY); 907 } 908 i -= dp->d_namlen; 909 910 if (i < 0) { 911 error = ENOMEM; 912 goto out; 913 } 914 if (dp->d_namlen == 1 && dp->d_name[0] == '.') { 915 error = ENOENT; 916 } else { 917 bcopy(dp->d_name, buf + i, dp->d_namlen); 918 error = 0; 919 } 920 goto out; 921 } 922 } while (len > 0 || !eofflag); 923 error = ENOENT; 924 925 out: 926 free(dirbuf, M_TEMP); 927 if (!error) { 928 *buflen = i; 929 vref(*dvp); 930 } 931 if (covered) { 932 vput(*dvp); 933 vrele(mvp); 934 } else { 935 VOP_UNLOCK(mvp); 936 vn_close(mvp, FREAD, cred, td); 937 } 938 vn_lock(vp, locked | LK_RETRY); 939 return (error); 940 } 941 942 int 943 vop_stdallocate(struct vop_allocate_args *ap) 944 { 945 #ifdef __notyet__ 946 struct statfs *sfs; 947 off_t maxfilesize = 0; 948 #endif 949 struct iovec aiov; 950 struct vattr vattr, *vap; 951 struct uio auio; 952 off_t fsize, len, cur, offset; 953 uint8_t *buf; 954 struct thread *td; 955 struct vnode *vp; 956 size_t iosize; 957 int error; 958 959 buf = NULL; 960 error = 0; 961 td = curthread; 962 vap = &vattr; 963 vp = ap->a_vp; 964 len = *ap->a_len; 965 offset = *ap->a_offset; 966 967 error = VOP_GETATTR(vp, vap, td->td_ucred); 968 if (error != 0) 969 goto out; 970 fsize = vap->va_size; 971 iosize = vap->va_blocksize; 972 if (iosize == 0) 973 iosize = BLKDEV_IOSIZE; 974 if (iosize > maxphys) 975 iosize = maxphys; 976 buf = malloc(iosize, M_TEMP, M_WAITOK); 977 978 #ifdef __notyet__ 979 /* 980 * Check if the filesystem sets f_maxfilesize; if not use 981 * VOP_SETATTR to perform the check. 982 */ 983 sfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 984 error = VFS_STATFS(vp->v_mount, sfs, td); 985 if (error == 0) 986 maxfilesize = sfs->f_maxfilesize; 987 free(sfs, M_STATFS); 988 if (error != 0) 989 goto out; 990 if (maxfilesize) { 991 if (offset > maxfilesize || len > maxfilesize || 992 offset + len > maxfilesize) { 993 error = EFBIG; 994 goto out; 995 } 996 } else 997 #endif 998 if (offset + len > vap->va_size) { 999 /* 1000 * Test offset + len against the filesystem's maxfilesize. 1001 */ 1002 VATTR_NULL(vap); 1003 vap->va_size = offset + len; 1004 error = VOP_SETATTR(vp, vap, td->td_ucred); 1005 if (error != 0) 1006 goto out; 1007 VATTR_NULL(vap); 1008 vap->va_size = fsize; 1009 error = VOP_SETATTR(vp, vap, td->td_ucred); 1010 if (error != 0) 1011 goto out; 1012 } 1013 1014 for (;;) { 1015 /* 1016 * Read and write back anything below the nominal file 1017 * size. There's currently no way outside the filesystem 1018 * to know whether this area is sparse or not. 1019 */ 1020 cur = iosize; 1021 if ((offset % iosize) != 0) 1022 cur -= (offset % iosize); 1023 if (cur > len) 1024 cur = len; 1025 if (offset < fsize) { 1026 aiov.iov_base = buf; 1027 aiov.iov_len = cur; 1028 auio.uio_iov = &aiov; 1029 auio.uio_iovcnt = 1; 1030 auio.uio_offset = offset; 1031 auio.uio_resid = cur; 1032 auio.uio_segflg = UIO_SYSSPACE; 1033 auio.uio_rw = UIO_READ; 1034 auio.uio_td = td; 1035 error = VOP_READ(vp, &auio, 0, td->td_ucred); 1036 if (error != 0) 1037 break; 1038 if (auio.uio_resid > 0) { 1039 bzero(buf + cur - auio.uio_resid, 1040 auio.uio_resid); 1041 } 1042 } else { 1043 bzero(buf, cur); 1044 } 1045 1046 aiov.iov_base = buf; 1047 aiov.iov_len = cur; 1048 auio.uio_iov = &aiov; 1049 auio.uio_iovcnt = 1; 1050 auio.uio_offset = offset; 1051 auio.uio_resid = cur; 1052 auio.uio_segflg = UIO_SYSSPACE; 1053 auio.uio_rw = UIO_WRITE; 1054 auio.uio_td = td; 1055 1056 error = VOP_WRITE(vp, &auio, 0, td->td_ucred); 1057 if (error != 0) 1058 break; 1059 1060 len -= cur; 1061 offset += cur; 1062 if (len == 0) 1063 break; 1064 if (should_yield()) 1065 break; 1066 } 1067 1068 out: 1069 *ap->a_len = len; 1070 *ap->a_offset = offset; 1071 free(buf, M_TEMP); 1072 return (error); 1073 } 1074 1075 static int 1076 vp_zerofill(struct vnode *vp, struct vattr *vap, off_t *offsetp, off_t *lenp, 1077 int ioflag, struct ucred *cred) 1078 { 1079 int iosize; 1080 int error = 0; 1081 struct iovec aiov; 1082 struct uio auio; 1083 struct thread *td; 1084 off_t offset, len; 1085 1086 iosize = vap->va_blocksize; 1087 td = curthread; 1088 offset = *offsetp; 1089 len = *lenp; 1090 1091 if (iosize == 0) 1092 iosize = BLKDEV_IOSIZE; 1093 /* If va_blocksize is 512 bytes, iosize will be 4 kilobytes */ 1094 iosize = min(iosize * 8, ZERO_REGION_SIZE); 1095 1096 while (len > 0) { 1097 int xfersize = iosize; 1098 if (offset % iosize != 0) 1099 xfersize -= offset % iosize; 1100 if (xfersize > len) 1101 xfersize = len; 1102 1103 aiov.iov_base = __DECONST(void *, zero_region); 1104 aiov.iov_len = xfersize; 1105 auio.uio_iov = &aiov; 1106 auio.uio_iovcnt = 1; 1107 auio.uio_offset = offset; 1108 auio.uio_resid = xfersize; 1109 auio.uio_segflg = UIO_SYSSPACE; 1110 auio.uio_rw = UIO_WRITE; 1111 auio.uio_td = td; 1112 1113 error = VOP_WRITE(vp, &auio, ioflag, cred); 1114 if (error != 0) { 1115 len -= xfersize - auio.uio_resid; 1116 offset += xfersize - auio.uio_resid; 1117 break; 1118 } 1119 1120 len -= xfersize; 1121 offset += xfersize; 1122 } 1123 1124 *offsetp = offset; 1125 *lenp = len; 1126 return (error); 1127 } 1128 1129 static int 1130 vop_stddeallocate(struct vop_deallocate_args *ap) 1131 { 1132 struct vnode *vp; 1133 off_t offset, len; 1134 struct ucred *cred; 1135 int error; 1136 struct vattr va; 1137 off_t noff, xfersize, rem; 1138 1139 vp = ap->a_vp; 1140 offset = *ap->a_offset; 1141 cred = ap->a_cred; 1142 1143 error = VOP_GETATTR(vp, &va, cred); 1144 if (error) 1145 return (error); 1146 1147 len = omin((off_t)va.va_size - offset, *ap->a_len); 1148 while (len > 0) { 1149 noff = offset; 1150 error = vn_bmap_seekhole_locked(vp, FIOSEEKDATA, &noff, cred); 1151 if (error) { 1152 if (error != ENXIO) 1153 /* XXX: Is it okay to fallback further? */ 1154 goto out; 1155 1156 /* 1157 * No more data region to be filled 1158 */ 1159 len = 0; 1160 error = 0; 1161 break; 1162 } 1163 KASSERT(noff >= offset, ("FIOSEEKDATA going backward")); 1164 if (noff != offset) { 1165 xfersize = omin(noff - offset, len); 1166 len -= xfersize; 1167 offset += xfersize; 1168 if (len == 0) 1169 break; 1170 } 1171 error = vn_bmap_seekhole_locked(vp, FIOSEEKHOLE, &noff, cred); 1172 if (error) 1173 goto out; 1174 1175 /* Fill zeroes */ 1176 xfersize = rem = omin(noff - offset, len); 1177 error = vp_zerofill(vp, &va, &offset, &rem, ap->a_ioflag, cred); 1178 if (error) { 1179 len -= xfersize - rem; 1180 goto out; 1181 } 1182 1183 len -= xfersize; 1184 if (should_yield()) 1185 break; 1186 } 1187 /* Handle the case when offset is beyond EOF */ 1188 if (len < 0) { 1189 offset += len; 1190 len = 0; 1191 } 1192 out: 1193 *ap->a_offset = offset; 1194 *ap->a_len = len; 1195 return (error); 1196 } 1197 1198 int 1199 vop_stdadvise(struct vop_advise_args *ap) 1200 { 1201 struct vnode *vp; 1202 struct bufobj *bo; 1203 daddr_t startn, endn; 1204 off_t bstart, bend, start, end; 1205 int bsize, error; 1206 1207 vp = ap->a_vp; 1208 switch (ap->a_advice) { 1209 case POSIX_FADV_WILLNEED: 1210 /* 1211 * Do nothing for now. Filesystems should provide a 1212 * custom method which starts an asynchronous read of 1213 * the requested region. 1214 */ 1215 error = 0; 1216 break; 1217 case POSIX_FADV_DONTNEED: 1218 error = 0; 1219 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1220 if (VN_IS_DOOMED(vp)) { 1221 VOP_UNLOCK(vp); 1222 break; 1223 } 1224 1225 /* 1226 * Round to block boundaries (and later possibly further to 1227 * page boundaries). Applications cannot reasonably be aware 1228 * of the boundaries, and the rounding must be to expand at 1229 * both extremities to cover enough. It still doesn't cover 1230 * read-ahead. For partial blocks, this gives unnecessary 1231 * discarding of buffers but is efficient enough since the 1232 * pages usually remain in VMIO for some time. 1233 */ 1234 bsize = vp->v_bufobj.bo_bsize; 1235 bstart = rounddown(ap->a_start, bsize); 1236 bend = roundup(ap->a_end, bsize); 1237 1238 /* 1239 * Deactivate pages in the specified range from the backing VM 1240 * object. Pages that are resident in the buffer cache will 1241 * remain wired until their corresponding buffers are released 1242 * below. 1243 */ 1244 if (vp->v_object != NULL) { 1245 start = trunc_page(bstart); 1246 end = round_page(bend); 1247 VM_OBJECT_RLOCK(vp->v_object); 1248 vm_object_page_noreuse(vp->v_object, OFF_TO_IDX(start), 1249 OFF_TO_IDX(end)); 1250 VM_OBJECT_RUNLOCK(vp->v_object); 1251 } 1252 1253 bo = &vp->v_bufobj; 1254 BO_RLOCK(bo); 1255 startn = bstart / bsize; 1256 endn = bend / bsize; 1257 error = bnoreuselist(&bo->bo_clean, bo, startn, endn); 1258 if (error == 0) 1259 error = bnoreuselist(&bo->bo_dirty, bo, startn, endn); 1260 BO_RUNLOCK(bo); 1261 VOP_UNLOCK(vp); 1262 break; 1263 default: 1264 error = EINVAL; 1265 break; 1266 } 1267 return (error); 1268 } 1269 1270 int 1271 vop_stdunp_bind(struct vop_unp_bind_args *ap) 1272 { 1273 1274 ap->a_vp->v_unpcb = ap->a_unpcb; 1275 return (0); 1276 } 1277 1278 int 1279 vop_stdunp_connect(struct vop_unp_connect_args *ap) 1280 { 1281 1282 *ap->a_unpcb = ap->a_vp->v_unpcb; 1283 return (0); 1284 } 1285 1286 int 1287 vop_stdunp_detach(struct vop_unp_detach_args *ap) 1288 { 1289 1290 ap->a_vp->v_unpcb = NULL; 1291 return (0); 1292 } 1293 1294 static int 1295 vop_stdis_text(struct vop_is_text_args *ap) 1296 { 1297 1298 return (ap->a_vp->v_writecount < 0); 1299 } 1300 1301 int 1302 vop_stdset_text(struct vop_set_text_args *ap) 1303 { 1304 struct vnode *vp; 1305 struct mount *mp; 1306 int error, n; 1307 1308 vp = ap->a_vp; 1309 1310 /* 1311 * Avoid the interlock if execs are already present. 1312 */ 1313 n = atomic_load_int(&vp->v_writecount); 1314 for (;;) { 1315 if (n > -1) { 1316 break; 1317 } 1318 if (atomic_fcmpset_int(&vp->v_writecount, &n, n - 1)) { 1319 return (0); 1320 } 1321 } 1322 1323 VI_LOCK(vp); 1324 if (vp->v_writecount > 0) { 1325 error = ETXTBSY; 1326 } else { 1327 /* 1328 * If requested by fs, keep a use reference to the 1329 * vnode until the last text reference is released. 1330 */ 1331 mp = vp->v_mount; 1332 if (mp != NULL && (mp->mnt_kern_flag & MNTK_TEXT_REFS) != 0 && 1333 vp->v_writecount == 0) { 1334 VNPASS((vp->v_iflag & VI_TEXT_REF) == 0, vp); 1335 vp->v_iflag |= VI_TEXT_REF; 1336 vrefl(vp); 1337 } 1338 1339 atomic_subtract_int(&vp->v_writecount, 1); 1340 error = 0; 1341 } 1342 VI_UNLOCK(vp); 1343 return (error); 1344 } 1345 1346 static int 1347 vop_stdunset_text(struct vop_unset_text_args *ap) 1348 { 1349 struct vnode *vp; 1350 int error, n; 1351 bool last; 1352 1353 vp = ap->a_vp; 1354 1355 /* 1356 * Avoid the interlock if this is not the last exec. 1357 */ 1358 n = atomic_load_int(&vp->v_writecount); 1359 for (;;) { 1360 if (n >= -1) { 1361 break; 1362 } 1363 if (atomic_fcmpset_int(&vp->v_writecount, &n, n + 1)) { 1364 return (0); 1365 } 1366 } 1367 1368 last = false; 1369 VI_LOCK(vp); 1370 if (vp->v_writecount < 0) { 1371 if ((vp->v_iflag & VI_TEXT_REF) != 0 && 1372 vp->v_writecount == -1) { 1373 last = true; 1374 vp->v_iflag &= ~VI_TEXT_REF; 1375 } 1376 atomic_add_int(&vp->v_writecount, 1); 1377 error = 0; 1378 } else { 1379 error = EINVAL; 1380 } 1381 VI_UNLOCK(vp); 1382 if (last) 1383 vunref(vp); 1384 return (error); 1385 } 1386 1387 static int 1388 vop_stdadd_writecount(struct vop_add_writecount_args *ap) 1389 { 1390 struct vnode *vp; 1391 struct mount *mp; 1392 int error; 1393 1394 vp = ap->a_vp; 1395 VI_LOCK_FLAGS(vp, MTX_DUPOK); 1396 if (vp->v_writecount < 0) { 1397 error = ETXTBSY; 1398 } else { 1399 VNASSERT(vp->v_writecount + ap->a_inc >= 0, vp, 1400 ("neg writecount increment %d", ap->a_inc)); 1401 if (vp->v_writecount == 0) { 1402 mp = vp->v_mount; 1403 if (mp != NULL && (mp->mnt_kern_flag & MNTK_NOMSYNC) == 0) 1404 vlazy(vp); 1405 } 1406 vp->v_writecount += ap->a_inc; 1407 error = 0; 1408 } 1409 VI_UNLOCK(vp); 1410 return (error); 1411 } 1412 1413 int 1414 vop_stdneed_inactive(struct vop_need_inactive_args *ap) 1415 { 1416 1417 return (1); 1418 } 1419 1420 int 1421 vop_stdioctl(struct vop_ioctl_args *ap) 1422 { 1423 struct vnode *vp; 1424 struct vattr va; 1425 off_t *offp; 1426 int error; 1427 1428 switch (ap->a_command) { 1429 case FIOSEEKDATA: 1430 case FIOSEEKHOLE: 1431 vp = ap->a_vp; 1432 error = vn_lock(vp, LK_SHARED); 1433 if (error != 0) 1434 return (EBADF); 1435 if (vp->v_type == VREG) 1436 error = VOP_GETATTR(vp, &va, ap->a_cred); 1437 else 1438 error = ENOTTY; 1439 if (error == 0) { 1440 offp = ap->a_data; 1441 if (*offp < 0 || *offp >= va.va_size) 1442 error = ENXIO; 1443 else if (ap->a_command == FIOSEEKHOLE) 1444 *offp = va.va_size; 1445 } 1446 VOP_UNLOCK(vp); 1447 break; 1448 default: 1449 error = ENOTTY; 1450 break; 1451 } 1452 return (error); 1453 } 1454 1455 /* 1456 * vfs default ops 1457 * used to fill the vfs function table to get reasonable default return values. 1458 */ 1459 int 1460 vfs_stdroot (mp, flags, vpp) 1461 struct mount *mp; 1462 int flags; 1463 struct vnode **vpp; 1464 { 1465 1466 return (EOPNOTSUPP); 1467 } 1468 1469 int 1470 vfs_stdstatfs (mp, sbp) 1471 struct mount *mp; 1472 struct statfs *sbp; 1473 { 1474 1475 return (EOPNOTSUPP); 1476 } 1477 1478 int 1479 vfs_stdquotactl (mp, cmds, uid, arg, mp_busy) 1480 struct mount *mp; 1481 int cmds; 1482 uid_t uid; 1483 void *arg; 1484 bool *mp_busy; 1485 { 1486 return (EOPNOTSUPP); 1487 } 1488 1489 int 1490 vfs_stdsync(mp, waitfor) 1491 struct mount *mp; 1492 int waitfor; 1493 { 1494 struct vnode *vp, *mvp; 1495 struct thread *td; 1496 int error, lockreq, allerror = 0; 1497 1498 td = curthread; 1499 lockreq = LK_EXCLUSIVE | LK_INTERLOCK; 1500 if (waitfor != MNT_WAIT) 1501 lockreq |= LK_NOWAIT; 1502 /* 1503 * Force stale buffer cache information to be flushed. 1504 */ 1505 loop: 1506 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1507 if (vp->v_bufobj.bo_dirty.bv_cnt == 0) { 1508 VI_UNLOCK(vp); 1509 continue; 1510 } 1511 if ((error = vget(vp, lockreq)) != 0) { 1512 if (error == ENOENT) { 1513 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1514 goto loop; 1515 } 1516 continue; 1517 } 1518 error = VOP_FSYNC(vp, waitfor, td); 1519 if (error) 1520 allerror = error; 1521 vput(vp); 1522 } 1523 return (allerror); 1524 } 1525 1526 int 1527 vfs_stdnosync (mp, waitfor) 1528 struct mount *mp; 1529 int waitfor; 1530 { 1531 1532 return (0); 1533 } 1534 1535 static int 1536 vop_stdcopy_file_range(struct vop_copy_file_range_args *ap) 1537 { 1538 int error; 1539 1540 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp, 1541 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, ap->a_incred, 1542 ap->a_outcred, ap->a_fsizetd); 1543 return (error); 1544 } 1545 1546 int 1547 vfs_stdvget (mp, ino, flags, vpp) 1548 struct mount *mp; 1549 ino_t ino; 1550 int flags; 1551 struct vnode **vpp; 1552 { 1553 1554 return (EOPNOTSUPP); 1555 } 1556 1557 int 1558 vfs_stdfhtovp (mp, fhp, flags, vpp) 1559 struct mount *mp; 1560 struct fid *fhp; 1561 int flags; 1562 struct vnode **vpp; 1563 { 1564 1565 return (EOPNOTSUPP); 1566 } 1567 1568 int 1569 vfs_stdinit (vfsp) 1570 struct vfsconf *vfsp; 1571 { 1572 1573 return (0); 1574 } 1575 1576 int 1577 vfs_stduninit (vfsp) 1578 struct vfsconf *vfsp; 1579 { 1580 1581 return(0); 1582 } 1583 1584 int 1585 vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname) 1586 struct mount *mp; 1587 int cmd; 1588 struct vnode *filename_vp; 1589 int attrnamespace; 1590 const char *attrname; 1591 { 1592 1593 if (filename_vp != NULL) 1594 VOP_UNLOCK(filename_vp); 1595 return (EOPNOTSUPP); 1596 } 1597 1598 int 1599 vfs_stdsysctl(mp, op, req) 1600 struct mount *mp; 1601 fsctlop_t op; 1602 struct sysctl_req *req; 1603 { 1604 1605 return (EOPNOTSUPP); 1606 } 1607 1608 static vop_bypass_t * 1609 bp_by_off(struct vop_vector *vop, struct vop_generic_args *a) 1610 { 1611 1612 return (*(vop_bypass_t **)((char *)vop + a->a_desc->vdesc_vop_offset)); 1613 } 1614 1615 int 1616 vop_sigdefer(struct vop_vector *vop, struct vop_generic_args *a) 1617 { 1618 vop_bypass_t *bp; 1619 int prev_stops, rc; 1620 1621 bp = bp_by_off(vop, a); 1622 MPASS(bp != NULL); 1623 1624 prev_stops = sigdeferstop(SIGDEFERSTOP_SILENT); 1625 rc = bp(a); 1626 sigallowstop(prev_stops); 1627 return (rc); 1628 } 1629 1630 static int 1631 vop_stdstat(struct vop_stat_args *a) 1632 { 1633 struct vattr vattr; 1634 struct vattr *vap; 1635 struct vnode *vp; 1636 struct stat *sb; 1637 int error; 1638 u_short mode; 1639 1640 vp = a->a_vp; 1641 sb = a->a_sb; 1642 1643 error = vop_stat_helper_pre(a); 1644 if (error != 0) 1645 return (error); 1646 1647 vap = &vattr; 1648 1649 /* 1650 * Initialize defaults for new and unusual fields, so that file 1651 * systems which don't support these fields don't need to know 1652 * about them. 1653 */ 1654 vap->va_birthtime.tv_sec = -1; 1655 vap->va_birthtime.tv_nsec = 0; 1656 vap->va_fsid = VNOVAL; 1657 vap->va_gen = 0; 1658 vap->va_rdev = NODEV; 1659 1660 error = VOP_GETATTR(vp, vap, a->a_active_cred); 1661 if (error) 1662 goto out; 1663 1664 /* 1665 * Zero the spare stat fields 1666 */ 1667 bzero(sb, sizeof *sb); 1668 1669 /* 1670 * Copy from vattr table 1671 */ 1672 if (vap->va_fsid != VNOVAL) 1673 sb->st_dev = vap->va_fsid; 1674 else 1675 sb->st_dev = vp->v_mount->mnt_stat.f_fsid.val[0]; 1676 sb->st_ino = vap->va_fileid; 1677 mode = vap->va_mode; 1678 switch (vap->va_type) { 1679 case VREG: 1680 mode |= S_IFREG; 1681 break; 1682 case VDIR: 1683 mode |= S_IFDIR; 1684 break; 1685 case VBLK: 1686 mode |= S_IFBLK; 1687 break; 1688 case VCHR: 1689 mode |= S_IFCHR; 1690 break; 1691 case VLNK: 1692 mode |= S_IFLNK; 1693 break; 1694 case VSOCK: 1695 mode |= S_IFSOCK; 1696 break; 1697 case VFIFO: 1698 mode |= S_IFIFO; 1699 break; 1700 default: 1701 error = EBADF; 1702 goto out; 1703 } 1704 sb->st_mode = mode; 1705 sb->st_nlink = vap->va_nlink; 1706 sb->st_uid = vap->va_uid; 1707 sb->st_gid = vap->va_gid; 1708 sb->st_rdev = vap->va_rdev; 1709 if (vap->va_size > OFF_MAX) { 1710 error = EOVERFLOW; 1711 goto out; 1712 } 1713 sb->st_size = vap->va_size; 1714 sb->st_atim.tv_sec = vap->va_atime.tv_sec; 1715 sb->st_atim.tv_nsec = vap->va_atime.tv_nsec; 1716 sb->st_mtim.tv_sec = vap->va_mtime.tv_sec; 1717 sb->st_mtim.tv_nsec = vap->va_mtime.tv_nsec; 1718 sb->st_ctim.tv_sec = vap->va_ctime.tv_sec; 1719 sb->st_ctim.tv_nsec = vap->va_ctime.tv_nsec; 1720 sb->st_birthtim.tv_sec = vap->va_birthtime.tv_sec; 1721 sb->st_birthtim.tv_nsec = vap->va_birthtime.tv_nsec; 1722 1723 /* 1724 * According to www.opengroup.org, the meaning of st_blksize is 1725 * "a filesystem-specific preferred I/O block size for this 1726 * object. In some filesystem types, this may vary from file 1727 * to file" 1728 * Use minimum/default of PAGE_SIZE (e.g. for VCHR). 1729 */ 1730 1731 sb->st_blksize = max(PAGE_SIZE, vap->va_blocksize); 1732 sb->st_flags = vap->va_flags; 1733 sb->st_blocks = vap->va_bytes / S_BLKSIZE; 1734 sb->st_gen = vap->va_gen; 1735 out: 1736 return (vop_stat_helper_post(a, error)); 1737 } 1738 1739 static int 1740 vop_stdread_pgcache(struct vop_read_pgcache_args *ap __unused) 1741 { 1742 return (EJUSTRETURN); 1743 } 1744 1745 static int 1746 vop_stdvput_pair(struct vop_vput_pair_args *ap) 1747 { 1748 struct vnode *dvp, *vp, **vpp; 1749 1750 dvp = ap->a_dvp; 1751 vpp = ap->a_vpp; 1752 vput(dvp); 1753 if (vpp != NULL && ap->a_unlock_vp && (vp = *vpp) != NULL) 1754 vput(vp); 1755 return (0); 1756 } 1757